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make sure not to zap volatile stores, thanks a lot to Dale for noticing this!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45402 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-12-29 07:15:45 +00:00
parent d60eedca01
commit b253a8b382
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4252,7 +4252,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Value)) { if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Value)) {
if (Chain.Val == Ld && Ld->getBasePtr() == Ptr && if (Chain.Val == Ld && Ld->getBasePtr() == Ptr &&
ST->getAddressingMode() == ISD::UNINDEXED && ST->getAddressingMode() == ISD::UNINDEXED &&
ST->getStoredVT() == Ld->getLoadedVT()) { ST->getStoredVT() == Ld->getLoadedVT() &&
!ST->isVolatile()) {
// The store is dead, remove it. // The store is dead, remove it.
return Chain; return Chain;
} }